Feature Request: Change Ssids in runtime

[phenomenoide]

@spacehuhn im still learning from your code, and i like to Play a little bit with this, i can for example read some sensors and put the values as a wifi name (something of wifi1: "temperature: 20°", wifi2: "pressure: Xvalue"), but i cant change the char, can you add a function to add values from variables in strings?. Thanks so much.